Hey there fellow marines. so ive been working on a new pulse rifle project for the last few months and as its finally finished I thought I would make a little thread about the build. Ive had a snow wolf pulse rifle for a few years now and while its a good gun I wanted something a bit more accurate with a working grenade launcher. Seeing as I also have a pps m870 shotgun I thought I would have a look to see if it was possible to put the shotgun inside the gl cage. Feeling confident my plan would work and my measurements where correct I bought a new Thompson aeg and a snow wolf pulse rifle kit.sorry about the poor picture quality.

After everything arrived I stripped the shotgun down, dremmeled all the plastic from inside the cage and placed the shotgun in.

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Nice fit but a bit long!

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Now to cut the shotgun down to size and dremmel out the plastic shroud for the trigger and trigger guard. This part I was dreading the most out of the whole project. measure twice cut once!

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the very rear part of the m870 had to be filed down and a small section of plastic removed on the plastic cover for the led display to be able to push the m870 back far enough but I'm happy with its position now.

The next job was to modify the gl cage to make it a bit more accurate. I drilled out all the slots leaving the two rear slots as they were to be filled Using jb weld.

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PLEASE NOTE THE PULSE RIFLE BUILD NOW CONTINUES AFTER THE COMMENTS BELOW!

_________________Happy Happy, Joy Joy

Last edited by stimpy on Wed Aug 23, 2017 8:00 pm, edited 3 times in total.

Can you tell me where you sourced the tiny lipo batteries for the main and counter circuits you're using as I've not found any airsoft suppliers with packs that small? I tried wiring my counter into the main circuit which worked ok until you live fired, at which point the voltage spikes played havoc with it! Reluctantly I had to change it back to a 9v but you seem to have found a good alternative.

Also, I like the idea of the charging hole under the side plate it's a stroke of genius! How does it work in practice though as it's not a very big hole? Do you have room to feed the charging and balance lead out the side when it comes to charging up?

I'm going to be adding a working GL also but I'm going about it in a different way- a mini moscart with 3D parts from Noble. I did think about trying to shoehorn a shotgun in but the extra cost and fear of ruining the m870 put me off somewhat, so fair play to you for a job well done!

Thanks damster! The display seems to run fine, no problems at all. Ive only put 1 half a high cap about 100 bbs through though. The battery i used is this one on ebay 221951914488 i just soldered a new connector on the pr wiring. I had to cut a hole in the wall of the battery compartment and have it running at a 45 degree angle to get it to fit still and made up a base to hold it and the wiring in place. You can see what i mean in one of the pics.

The ports behind the side plates work ok. The charger side has a 200mm extention lead added to the battery for easier charging. The other side is the mini tamya connection which is a bit more fiddly with fingers but with long nose pliers its no problem at all. It was the only route i could think of if i was going to have an internal battery!Ill add a few more pictures for you this evening if you want?

Ah I see! More pics would be great although I'm not sure I have enough space for a crane stock battery as I've got a Mosfet fitted in that location. Thanks for the link for the counter battery. I really have to get that sorted as a 9V battery poking out the magwell ruins the look and it's vulnerable when airsofting during mag changes etc

Heres a few more pictures as promised. Showing both the pr battery connection , charging cable ports and the battery for the display. Unfortunately i dont have anymore of the insides.I have also put 2 mags of 200 bbs each through it this evening and the counter hasn't stuttered once!

Location: PacNorWest
Service Number: A04/TQ1.0.52130E1
Country: United States

Very cool build! That's a LOT of work, knowing how much of a pain it can be to just take apart one of those Snow Wolf PRs.

Just out of curiosity did you just use standard 2-part J-B Weld? Have you tried their Epoxy Putty? I like it and I've used it on a number of projects to be able to easily do fills and build-ups, but it does have a short working time, only a few minutes before it starts to set hard.

As to the battery for the display counter, another idea would to be use a stack of three CR2025 or CR2032 coin batteries. That would give you 9 volts @ 165 mAh or 220 mAh, with dimenstions of 20 mm (diameter) X 7.5 mm or 9.6 mm respectively. It won't last as long obviously but it won't take up much space.

-scoff

_________________Convincing your girlfriend she's crazy or paranoid is called gaslighting, and it's a dick move. But convincing her she's an android with artificially implanted human emotions is called bladerunning. It's a Phillip K. Dick move.

Thanks alot scoffman! Im pretty proud of what i have achieved I stripped my old snow wolf to do a few light mods and a repaint and that was something i really didnt want to do again so bought this one in kit form which was really hard to track down. Ive only used two roll pins in this one so it should come apart pretty easy if it needs too be.

Im pretty sure its just the standard black and white two part glue that i used. Im a bit of a novice when it comes to jobs like that but ill keep the putty in mind for next time!

I didnt think about those batterys. That may of been an even better route to go down. Ill see how i get on with this lipo. I like that this battery is rechargable which is great for when when i accidently leave it on all day it can always be swapped to the watch batterys at a later date.

Thanks corp hicks. Im glad she getting some love! Its my first go at something of this scale so i wasn't even sure if i could do it. i had a few ideas in my head about how i would do certain parts, the rest i made up as i went .

Its a cyma thompson. Would like a full metal kings arms one day but they are quite hard to find and pretty pricey

I have only just finished really so haven't skirmished her yet. I will do soon but she is more of a display peice with the odd skirmish here an there.

Thanks for the pics I understand it a bit better now It's a good idea but I may end up with the battery in the GL on mine. I keep meaning to start a thread for mine but it won't be all that impressive after your build!

I've just noticed you've changed the front vent to different one- How have you attached this, is it bolted through the spas cage like the original?

Yeah i have glued 4 3mm steel pads in the gl top with holes tapped out to 3mm which the vent and also the sling bracket is bolted too. That way it can hopefully be carried by a sling as the new aluminium vent would never have coped having the gun hanging from it!

Oooo....the pics are magically reappearing! My PR will be here Wednesday and I ordered a PPS M870 from Hong Kong today. Only place I could find the darn thing in stock at a reasonable price. Thanks, stimpy! This is going to be such a huge help to me!

The original pump grip slot was also filled and smoothed using more jb weld (fantastic stuff).

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The shell ejection port had to be moved back around 10mm as it didn't line up with the shotgun to well. you guessed it more jb weld! Also extended the slot in underneath for the much bigger loading ramp on the shotgun.

I then had to tackle the job of making a bracket to connect the shotgun to the Thompson. luckily I found a perfect aluminium block in the scrap bin at work.

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after a few hours of cutting ,filing, drilling and tapping I had the two guns connected together.

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A square of 3mm plate was drilled and tapped onto the pump arm of the shotgun and the slot for the pump grip was added in the correct place.

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An aluminium plate was made cut and recess was dremmeled into the pump grip. Also a 5mm aluminium strip was added under the pump grip for the spacer. Then a pilot drill was drilled down through the pump grip to the 3mm plate on the shotgun. The holes where then tapped and the pump grip bolted into place.

we have power! the display now runs off a 7.4v mini lipo.Red film added to the display window and the shrouds have been painted with ral 7013 made up by local paint shop. not quite bess brown but I'm happy with it! A little black pigment has been rubbed over it to dirty it up followed buy satin lacquer. The cut out in the shroud is where the lipo for the thompson is charged from. The side plate screws on to there to hide everything from sight.

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Grub screws added to grenade block.

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Final assembly, fake allen key bolt drilled out of grenade block and replaced with a real bolt which screws into the shotgun shell tube end cap.

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